What would happen if you had tyres rated for say 120mph but did 150+mph??? Would they melt? Fall apart? Pop? Or similar???
Bit of a silly question I know and I'm not about to go really fast either

 

why not try it n let us know

think they may not be up to the pressures put on them and just fall apart i would have thought

cant imagine they would do it on a one off but it would put a lot of strain on them n next its pop, bang, spin out, crash, died

 

I have been overspeed on loads of tyres, never had a problem.
If they were Goodyear Eagle F1 GSD3 to start with they will most likely go pop anyway at any speed!!
tabetha

 

What makes you say that?

Mine were fine at 170mph.

 

Why do you say that?

I have a set of "Goodyear Eagle F1 GSD2 215/40/16" on my car.

 

lol me 2

 

Oh dear!

Come on tabetha why do you say that?

 

but you've got 168.84mph in your sig

 

IIRC Christian is quite sure and has said on here that the car has done 170!

Anyway, I've got Eagle F1's, why was this said?

 

 

is it not something to do with the centrifugal forces , are the tyres only designed within a limit of sidewall flex , above this wont they "narrow" themselves ?

 

i did wonder this about yours the other day actually mr c, was reading the right up in performance ford about tyres


what is yours rated at then?

 

I run 205/45 ZR16's.

I often wonder about people doing Top Speed runs on V-Rated tyres. I bet alot of people do, especially with these budget wheel/tyre builds around which have cheap tyres on them.

 

I only said that as I have bought in the past three new goodyear eagle f1 tyres aand two of the three within two years developed sidewall bulges, so had to be scrapped.
Goodyear were useless when I moaned and said I must of hit something(kerb) with them, unlikely as one had always been a spare and never fitted, I have had pm's from others who have suffered the same with these tyres.
It is a shame as I did rate these tyres very highly, not the best by any means but in my top five anyway.
I like the GOODYEAR SUPERCUP a lot better, but F*****G scary in the wet, maybe that's why they don't import them!!
tabetha

 

they are all rated with a factor of safety in mind. You will see on the sidewall it will say maximum pressure 50psi for example, doesn't mean it will blow up at 51psi, I think tyre pressures have a factor of safety of 2, that means they are perfectly safe at 100 psi!

As for speed ratings, I dont know what the speed rating is, but a tyre rated to 150mph should be perfectly safe for 200mph+.
























Dont quote me on that though

 

do you know what r888 are rated at? im on 235-40-17

 

I think they are rated at 180 mph as they are W rated.

 

dont think i will get any where near that then


just over the ton will be about right for me

 

they only warrant the up to the speed rating, after that theres no comes backs on them

 

if i am right the speed rating is for a constant speed tested over a certain distance so a brief blat over the limit will be okay but kept over their limit for a time and they will deteriate quite badly quite quickly and will fall apart................i think this is right